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Type: Task
Resolution: Unresolved
Priority: Normal
Fix Version/s: None
Affects Version/s: None
Component/s: openvswitch3.1, openvswitch3.3, openvswitch3.4
Labels:
- OVS-QE-Test-Coverage

Blocked:
False
Blocked Reason:

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Ready:
False
Epic Link:
FDP-995
Acceptance Criteria:

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( ) The test coverage is aligned with the epic's acceptance criteria

Given a system with OVS and mlx5_core driver managing VF ports,

When VMs are connected to OVS using those VF ports and flows are added to OVS for forwarding traffic between them,

Then the VMs should be able to communicate with each other successfully (e.g., ping commands between VMs should work).

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( ) The test coverage is aligned with the epic's acceptance criteria Given a system with OVS and mlx5_core driver managing VF ports, When VMs are connected to OVS using those VF ports and flows are added to OVS for forwarding traffic between them, Then the VMs should be able to communicate with each other successfully (e.g., ping commands between VMs should work).
Planning:
None
AssignedTeam:
rhel-net-ovs-dpdk
Intelligence Requested:
Market:

SFDC Cases Links:
SFDC Cases Open:
SFDC Cases Counter:

This task is tracking the test case writing activities to cover the bug described below.

Description of problem:
mlx5_core driver: guest failed to ping each other when add vf port to ovs bridge

Version-Release number of selected component (if applicable):
5.14.0-284.92.1.el9_2.x86_64
openvswitch3.1-3.1.0-140.el9fdp
openvswitch3.3-3.3.0-62.el9fdp
openvswitch3.4-3.4.0-18.el9fdp

How reproducible:
Steps to Reproduce:
echo 2 > /sys/devices/pci0000:5d/0000:5d:02.0/0000:5f:00.0/sriov_numvfs
#configure the vf 0 mac same with the mac of enp0s9 port inside master4
ip link set ens2f0np0 vf 0 mac 52:54:00:11:8f:e9
#configure the vf 1 mac same with the mac of enp0s9 port inside master5
ip link set ens2f0np0 vf 1 mac 52:54:00:11:8f:e8
ovs-vsctl add-port ovsbr0 ens2f0v0
ovs-vsctl add-port ovsbr0 ens2f0v1

[root@dell-per740-03 ~]# ip link show
8: ens2f0np0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether 94:6d:ae:b8:3f:a2 brd ff:ff:ff:ff:ff:ff
vf 0 link/ether 52:54:00:11:8f:e9 brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust on, query_rss off
vf 1 link/ether 52:54:00:11:8f:e8 brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust on, query_rss off
altname enp95s0f0np0

start guest master4 with following xml:

[root@dell-per740-03 ~]# virsh dumpxml master4
<domain type='kvm' id='1'>
  <name>master4</name>
  <uuid>37425e76-af6a-44a6-aba0-73434afe34c2</uuid>
  <memory unit='KiB'>8388608</memory>
  <currentMemory unit='KiB'>8388608</currentMemory>
  <memoryBacking>
    <hugepages>
      <page size='1048576' unit='KiB' nodeset='0'/>
    </hugepages>
    <access mode='shared'/>
  </memoryBacking>
  <vcpu placement='static'>3</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='0'/>
    <vcpupin vcpu='1' cpuset='1'/>
    <vcpupin vcpu='2' cpuset='2'/>
    <emulatorpin cpuset='1'/>
  </cputune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-q35-rhel9.2.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-passthrough' check='none' migratable='on'>
    <feature policy='require' name='tsc-deadline'/>
    <numa>
      <cell id='0' cpus='0-2' memory='8388608' unit='KiB' memAccess='shared'/>
    </numa>
  </cpu>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/master4.qcow2' index='1'/>
      <backingStore/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <alias name='usb'/>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <alias name='usb'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <alias name='usb'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pcie-root'>
      <alias name='pcie.0'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </controller>
    <controller type='sata' index='0'>
      <alias name='ide'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:11:8f:e9'/>
      <source bridge='ovsbr0'/>
      <virtualport type='openvswitch'>
        <parameters interfaceid='f54fd445-25b0-4231-8ea7-b83f2a1f8df2'/>
      </virtualport>
      <target dev='tap0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
    </interface>
    <interface type='bridge'>
      <mac address='52:54:00:bb:63:7b'/>
      <source bridge='virbr0'/>
      <target dev='vnet0'/>
      <model type='virtio'/>
      <alias name='net1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/0'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/0'>
      <source path='/dev/pts/0'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <channel type='unix'>
      <source mode='bind' path='/run/libvirt/qemu/channel/1-master4/org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0' state='connected'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
      <address type='usb' bus='0' port='1'/>
    </input>
    <input type='mouse' bus='ps2'>
      <alias name='input1'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input2'/>
    </input>
    <graphics type='vnc' port='5900' autoport='yes' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <audio id='1' type='none'/>
    <video>
      <model type='virtio' vram='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'>
    <label>system_u:system_r:svirt_t:s0:c699,c734</label>
    <imagelabel>system_u:object_r:svirt_image_t:s0:c699,c734</imagelabel>
  </seclabel>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+107:+981</label>
    <imagelabel>+107:+981</imagelabel>
  </seclabel>
</domain>

start guest master5 with following xml:

[root@dell-per740-03 ~]# virsh dumpxml master5
<domain type='kvm' id='2'>
  <name>master5</name>
  <uuid>37425e76-af6a-44a6-aba0-73434afe34c3</uuid>
  <memory unit='KiB'>8388608</memory>
  <currentMemory unit='KiB'>8388608</currentMemory>
  <memoryBacking>
    <hugepages>
      <page size='1048576' unit='KiB' nodeset='0'/>
    </hugepages>
    <access mode='shared'/>
  </memoryBacking>
  <vcpu placement='static'>3</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='3'/>
    <vcpupin vcpu='1' cpuset='4'/>
    <vcpupin vcpu='2' cpuset='5'/>
    <emulatorpin cpuset='6'/>
  </cputune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-q35-rhel9.2.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-passthrough' check='none' migratable='on'>
    <feature policy='require' name='tsc-deadline'/>
    <numa>
      <cell id='0' cpus='0-2' memory='8388608' unit='KiB' memAccess='shared'/>
    </numa>
  </cpu>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/master5.qcow2' index='1'/>
      <backingStore/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <alias name='usb'/>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <alias name='usb'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <alias name='usb'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pcie-root'>
      <alias name='pcie.0'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </controller>
    <controller type='sata' index='0'>
      <alias name='ide'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:11:8f:e8'/>
      <source bridge='ovsbr0'/>
      <virtualport type='openvswitch'>
        <parameters interfaceid='f54fd445-25b0-4231-8ea7-b83f2a1f8df2'/>
      </virtualport>
      <target dev='tap1'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
    </interface>
    <interface type='bridge'>
      <mac address='52:54:00:bb:63:7a'/>
      <source bridge='virbr0'/>
      <target dev='vnet1'/>
      <model type='virtio'/>
      <alias name='net1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/1'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/1'>
      <source path='/dev/pts/1'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <channel type='unix'>
      <source mode='bind' path='/run/libvirt/qemu/channel/2-master5/org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0' state='connected'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
      <address type='usb' bus='0' port='1'/>
    </input>
    <input type='mouse' bus='ps2'>
      <alias name='input1'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input2'/>
    </input>
    <graphics type='vnc' port='5901' autoport='yes' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <audio id='1' type='none'/>
    <video>
      <model type='virtio' vram='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'>
    <label>system_u:system_r:svirt_t:s0:c338,c552</label>
    <imagelabel>system_u:object_r:svirt_image_t:s0:c338,c552</imagelabel>
  </seclabel>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+107:+981</label>
    <imagelabel>+107:+981</imagelabel>
  </seclabel>
</domain>

ovs topo as following:

[root@dell-per740-03 ~]# ovs-vsctl show
1d256f50-1961-4f71-875d-5a7f2d7109a5
    Bridge ovsbr0
        Port ens2f0v0
            Interface ens2f0v0
        Port tap0
            Interface tap0
        Port ens2f0v1
            Interface ens2f0v1
        Port ovsbr0
            Interface ovsbr0
                type: internal
        Port tap1
            Interface tap1
    ovs_version: "3.1.7-140.el9fdp"

ovs-ofctl add-flow ovsbr0 in_port=ens2f0v0,actions=output:tap0
ovs-ofctl add-flow ovsbr0 in_port=ens2f0v1,actions=output:tap1
ovs-ofctl add-flow ovsbr0 in_port=tap0,actions=output:ens2f0v0
ovs-ofctl add-flow ovsbr0 in_port=tap1,actions=output:ens2f0v1

configure the ip address 20.0.0.2/24 to the port inside master4

[root@dell-per740-03 ~]# virsh console master4
Connected to domain 'master4'
Escape character is ^] (Ctrl + ])

[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:bb:63:7b brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.138/24 brd 192.168.122.255 scope global dynamic noprefixroute enp0s3
       valid_lft 2855sec preferred_lft 2855sec
    inet6 fe80::cf73:83d6:70a8:8087/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: enp0s9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:11:8f:e9 brd ff:ff:ff:ff:ff:ff
    inet 20.0.0.2/24 scope global enp0s9
       valid_lft forever preferred_lft forever
    inet6 2001:5c0:9168::2/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::604:b110:7ceb:4386/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

configure the ip address 20.0.0.3/24 to the port inside master5

[root@dell-per740-03 ~]# virsh console master5
Connected to domain 'master5'
Escape character is ^] (Ctrl + ])

[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:bb:63:7a brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.137/24 brd 192.168.122.255 scope global dynamic noprefixroute enp0s3
       valid_lft 2884sec preferred_lft 2884sec
    inet6 fe80::b65c:5598:50ed:37ac/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: enp0s9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:11:8f:e8 brd ff:ff:ff:ff:ff:ff
    inet 20.0.0.3/24 scope global enp0s9
       valid_lft forever preferred_lft forever
    inet6 2001:5c0:9168::3/64 scope global 
       valid_lft forever preferred_lft forever

Inside master4, ping the ip address(20.0.0.3) of master5:

Actual results:
guest failed to ping each other when add vf port to ovs bridge
[root@localhost ~]# ping 20.0.0.3
PING 20.0.0.3 (20.0.0.3) 56(84) bytes of data.
From 20.0.0.2 icmp_seq=1 Destination Host Unreachable
From 20.0.0.2 icmp_seq=5 Destination Host Unreachable
From 20.0.0.2 icmp_seq=6 Destination Host Unreachable

Expected results:
guest ping each other successfully when add vf port to ovs bridge

Additional info:

Assignee:: ovsdpdk triage

Reporter:: NST Bot

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Created:: 2025/11/07 4:52 PM

Updated:: 2025/11/10 9:40 AM

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